While there are numerous business school courses, self-help books and magazine articles devoted to parsing a billionaire’s investment strategy or entrepreneurial skills, few, if any, pay close attention to their personality traits. For 21 years, Forbes has been observing billionaires and has detected very pronounced similarities among the majority of them. We can roughly categorize these as:

A. Master of the Universe
B. All Business
C. Sports Fan
D. Geek
E. Old Money